Nipple-threading mechanism.



H. W. OSTER. NIPPLE THREADING MEGHANISM. APPLIGATION FILED SEPT 7 1909Patented Feb.8,1910.

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H. W. OSTBR.

NIPPLE THRBADING MEGHANISM.

APPLICATION FILED SBPTJ, 1909 948,798. Pfjnenteay Feb. 8, 1910.

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HERMAN W. OSTER, OF CLEVELAND, OHIO, ASSIGNOR TO THE OSTER MANUFACTURINGCOMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

NIPPLE-THREADING MECHANISM.

To all rwhom it may concern:

Be it known that I, HERMAN W. OSTER, a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented a certain new and useful Improvement in Nipple-'ThreadingMechanism, of which the following is a full, clear, and exactdescription.

This invention relates to means for threading nipples that is to say,the short sections of pipe having at both ends external slightly taperedthreads.

The invention resides in the nipple holding jaws shown, and in thedescribed combination of such jaws with a machine adapted for cuttingtapered threads.

The invention is hereinafter described and definitely set forth in theclaims, and illustrated in the accompanying drawings, in which- `Figurel is a perspective view of a machine embodying the invention. Fig. 2 isa front elevation of the nipple holding devices. Fig. 3 is a horizontalsection through the nipple holding mechanism and through the rear end ofthe head,-the section being in the plane indicated by line 3 3 on Fig.2. Fig. t is a front view, Fig. 5 an inner side view, and Fig. 6 a rearview of one of the nipple holding aws.

rlhe thread cutting mechanism shown is of well known construction. Itincludes a r0- tatable tubular head A; thread cutting chasers B whichare carried by and are movable radially upon said head toward and fromits axis; and a cam plate C mounted on the head and adapted to turnabout the axis thereof and to engage with and move the chasers inward oroutward. The machine also contains a pair of vise jaws E adapted tograsp and hold a piece of pipe while it is being threaded. These jawsare mounted on a slide D which is movable in a path parallel with theaxis of the head. The vise jaws are movable on this slide horizontallytoward and from each other and the axis of said head. A right and leftfeed screw F may be mounted on the slide for so moving said vise jaws.

The machine shown, in respect to the parts above mentioned, is wellknown in the art, and therefore requires no more detailed description.The cutting ends of the chasers may be formed so as to cut taperedthreads; or the cam plate may be turned on Specification of LettersPatent.

Application filed September 7, 1909.

Patented Feb. tl, i910.

Serial No. 516,371.

the head while the latter is turning so that the threads cut will betapered. rlhe construction and mode of operation above mentioned are oldand well known.

The nipple holding jaws G, which will now be described, and theircombination with said machine constitute the novel feature of theinvention as defined by the claims. These two jaws are removably securedto the front faces of the two vise Vjaws respectively. vFach nipple jawhas a back plate g, and a forwardly projecting approximatelysemi-cylindrical fiange g which is internally threaded. On the rear sideof the back plate is a boss g2 which is to be putinto a countersunkrecess e in the front face of the associated vise jaw. A bolt H passesthrough a hole in the vise aw and into a threaded hole gL of the nipplejaw. Then the boss g2 is in the recess e, and when the lower edge of thenipple jaw is engaging with a forwardly projecting flange c on the visejaw, the bolt H is tightened up and the nipple jaw is thereby immovablyfixed to the vise jaw in proper relation thereto and to the head. `Whenboth nipple jaws are so secured to the vise jaws, the two flanges g forma substantially semi-cylindrical clamp which is internally threaded andthereby adapted to grasp the threaded end of a short pipe section ornipple K; and the external diameter of this cylindrical clamp made up ofthe two flanges g is less than the internal diameter of the rear end ofthe chaser carrying head A. On each nipple jaw is a flange g3 whichextends into and partly across the space between the two flanges g; therear end of the nipple K in the grip of said jaws should engage with theanges g3.

To use the machine described for making threaded nipples, a pipe, heldin the vise jaws, is threaded by the chasers carried by the head, saidthread extending as far back from the end of the pipe as desired. Thechasers should be constructed or manipulated so that this thread will beslightly tapered. After this thread is cut, the threaded portion and arequired length of unthreaded pipe is cut off. Nipple jaws G, G of thesizeV corresponding with the threaded end of said nipple are secured tothe vise jaws as stated. Then the threaded end of said nipple is putinto the recess between the fianges g so that when the vise jaws aremoved toward each other the threaded nipple or pipe section will begripped. Then the slide l) is moved toward the head, and thereby theunthreaded end of the nipple is presented to the action of the ichasers. Then these begin to cut their threads they will or may causethe nipple to turn in the threaded jaws until the end of the nipple isbrought against the flanges g3 which prevents further turning. As theslide D is advanced a tapered thread is cut on the nipple. The fact thatthe external diameter of the clamp composed of the two flanges (/3 isless than the internal diameter' of the head, permits these flanges toenter the head and carry the nipple along so that the chasers may cut athread thereon right up to the ends of said flanges. rlhe threads socut, if the dies are properly shaped or manipulated, will be tapered andthereby there will be produced a nipple threaded at and tapered fromboth ends. The threads may even be continuous from end to end.

Having described my invention, I claim: l. In a thread cutting machine,the conibination with the tubular rotatable chasercarrying head, of twovise jaws, and means for moving them simultaneously toward and from eachother and the axis of said head, withtwo nipple jaws respectivelysecured against the front faces of said two vise jaws, each nipple jawhaving a forwardly projecting` approximately semi-cylindrical flangewhich is internally threaded, the diameter of said flanges being suchthat when they are closed in upon a nipple they can enter the tubularcenter of said liead.

2. In a thread cutting machine, the coinbination with two vise jaws andmeans for g moving them `simultaneously toward and?` from each other, oftwo nipple jaws securedrespectively to the front faces of said visejaws, each of said nipple jaws comprising a back plate adapted to besecured to the vise jaws, and a forwardly extended approximatelysemi-cylindrical flange which is internally threaded.

3. In a thread cutting machine, the combination with two vise jaws andmeans for moving them simultaneously toward and from each other, of twonipple jaws secured respectively to the front faces of said vise jaws,each of said nipple comprising a back plate adapted to be secured to thevise' jaws, and a forwardly extended approximately semi-cylindricalflange which is internally threaded, each of said nipple jaws having aflange extending inward into the space between said semi-cylindricalflanges and at the rear ends thereof.

il. The combination of two vise jaws each having a forwardly projectingflange, means for moving said vise jaws simultaneously toward and fromeach other, with two nipple jaws secured respectively to the front facesof said vise aws, each nipple jaw having a back plate which is securedto the vise jaw and whose lower end engages with the flange on said visejaw, and which has also a for- 'ardly projecting approximatelysemi-cylindrical flange which is internally threaded.

rPhe combination of two vise jawseach having a forwardly projecting`flange, a hole through it from front to back and a counter recess in itsfront face around said hole, with two nipple jaws each of which has (l)a threaded hole, (2) a boss on its rear face around said hole which litsinto the recess in the corresponding vise jaw, (3) a forwardlyprojecting approximately semi-cylindrical flange which is internallythreaded, and (4) an inwardly extended flange at the rear end of saidthreaded flange.

In testimony whereof, I hereunto affix my signature in the presence oftwo witnesses.

HERhL-N lV. OSTER.

IVitnesses CARY R. ALBURN, E. L. THUnsToN.

